22 5. Maintenance
5. Maintenance
There are no customer-serviceable parts inside. Unauthorized inspections and repairs
could cause fires and electrical shock hazards.
Please call our field representative or your nearest JRC office for inspection and
repair services.
5.1 Daily maintenance
The life of the device depends on how daily maintenance and inspection are performed carefully.
To keep the device in the best condition at all times, it is recommendable to perform periodical
inspections constantly. Any failure in the device can be prevented before it occurs through such
inspections.
Please perform the inspections shown in the table below periodically.
Maintenance and inspection methods
Caution: Be sure to turn off power before starting inspection of the device.
No. Item
Maintenance and inspection
1 Cleaning
Remove stains from the panel face, controls, switches, top cover, and
bottom cover by wiping them lightly with dry cloth.
Thoroughly clean the ventilation hole, in particular, using a feather to
assure good flow of air.
2 Loosening of parts
Check screws, nuts, controls, switches, volume knobs, connectors,
etc. for any looseness to prevent them from dropping off and
retighten them correctly.
3 Cable Unit
Inspect the state of connection of cables between units as well as
connectors so that they are connected correctly.
4 Fuses
When the power fuse has blown, replace it after finding the cause.
Use a fuse sealed in a glass tube (included in the spare parts).
Attention: When cleaning the surface, do not use any organic solvent such as thinner or
benzine. Otherwise, the painting on the surface may be damaged. For cleaning
the surface, remove the dust and refuse and wipe with clean dry cloth.
5.2 Troubleshooting for Malfunctions or Abnormalities
Contact our service center or agent when any of the following is observed:
• The display does not light up, the whole unit is not turned on after the power
switch has been set ON or when does not appear on the display.
• Smoking, burning odors or unusual heat is emitted by the unit.
When any of this happens, turn off the unit and pull out the power cable.
Then, contact our center or agent.
Summary of Contents for JLN-550 -
Page 2: ......
Page 4: ...ii General Information...
Page 8: ...vi External View External View 2 axis type 3 axis type...
Page 10: ......
Page 40: ...30 APPENDIX 2 Outline and Setting drawing Standard Equipment 1 NWW 60DA MAIN DISPLAY...
Page 41: ...APPENDIX 31 2 NWW 60DB MAIN DISPLAY...
Page 42: ...32 APPENDIX 3 NWW 60TA MAIN DISPLAY...
Page 43: ...APPENDIX 33 4 NWW 60TB MAIN DISPLAY...
Page 44: ...34 APPENDIX 5 NQA 3012 SIGNAL DISTRIBUTOR...
Page 45: ...APPENDIX 35 6 NJC 24 SIGNAL PROCESSOR...
Page 46: ...36 APPENDIX 7 NKF 770 TRANSDUCER...
Page 58: ......
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